/* 页面基础样式 */
body {
    width: 1000px;
    height: 100%;
    margin: 0 auto;
    border: 2px solid black;
}
h1{
    text-align: center;
}
#hezi1 {
    width: 100%;
    height: 160px;
    border: 2px solid black;
    float: left;

}
#hezi1 #hezi2 {
    width: 800px;
    height: 160px;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    grid-template-rows: repeat(2, 1fr);
    border: 1px solid #ccc;
    float: left;
}
#hezi1 #hezi2 .div1{
    border: 1px solid black;
}

#hezi1 #div4 {
    width: 19%;
    height: 160px;
    float: left;
}
#hezi3{
    width: 100%;
    height: 500px;
}
#hezi3 p{
    font-size: 20px;
}